caa a22 4500 477133045 CHVBK 20180405111709.0 cr unu---uuuuu 170330e19970301xx s 000 0 eng 10.1023/A:1002997522379 doi (NATIONALLICENCE)springer-10.1023/A:1002997522379 Hypersensitive resistance to tomato spotted wilt virus in three Capsicum chinense accessions is controlled by a single gene and is overcome by virulent strains [Elektronische Daten] [B. Moury, A. Palloix, K. Gebre Selassie, G. Marchoux] The resistant reaction to tomato spotted wilt virus (TSWV) was found to be determined by a single dominant gene in three Capsicum chinense Jacq. accessions (‘PI 152225', ‘PI 159236', ‘7204'). Allelism studies indicated that all C. chinense lines bear the same allele located at the Tsw locus. All the inoculated plants in the allelism tests displayed a resistant hypersensitive phenotype characterized by necrotic local lesions followed by abscission of the inoculated organ. However, a small proportion of them showed late systemic infection. Nine TSWV isolates obtained from these individual plants with systemic symptoms were backinoculated to the three resistant parents. All isolates were able to infect systemically all the resistant accessions without inducing local necrotic lesions. Serological analysis confirmed that these nine viral isolates belong to the TSWV species (serogroup I). Consequently, the susceptible plants in the allelism tests could not be interpreted as possessing a recombinant genotype because of the virulence change in the viral strain. Hobbs et al. (1994) already reported the existence of TSWV pathotypes overcoming the resistance of C. chinense resistant accessions. Practical consequences for pepper breeding associated with the emergence of these resistance-breaking isolates are discussed. Kluwer Academic Publishers, 1997 allelism test nationallicence Capsicum chinense nationallicence hypersensitive resistance nationallicence pepper nationallicence tomato spotted wild virus nationallicence virus evolution nationallicence Moury B. INRA Station d'Amélioration des Plantes Maraîchères, France aut Palloix A. INRA Station d'Amélioration des Plantes Maraîchères, France aut Gebre Selassie K. Station de Pathologie Végétale, BP 94, 84143, Montfavet Cedex, France aut Marchoux G. Station de Pathologie Végétale, BP 94, 84143, Montfavet Cedex, France aut Euphytica Kluwer Academic Publishers 94/1(1997-03-01), 45-52 0014-2336 94:1<45 1997 94 10681 https://doi.org/10.1023/A:1002997522379 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002997522379 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moury B. INRA Station d'Amélioration des Plantes Maraîchères, France aut NATIONALLICENCE 700 1- Palloix A. INRA Station d'Amélioration des Plantes Maraîchères, France aut NATIONALLICENCE 700 1- Gebre Selassie K. Station de Pathologie Végétale, BP 94, 84143, Montfavet Cedex, France aut NATIONALLICENCE 700 1- Marchoux G. Station de Pathologie Végétale, BP 94, 84143, Montfavet Cedex, France aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 94/1(1997-03-01), 45-52 0014-2336 94:1<45 1997 94 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer